INTINERANT MAGNETISM AND ITS CHARACTERIZATION IN HETEROGENEOUS SYSTEMS
Randall H. Victora · eScholarship (California Digital Library) · 1985
are difficult or impossible to treat by first-principle methods, and to test for unusual configurations or symmetry breaking in simple systems.Important conclusions drawn from these calculations include:1.The unusual shape of the Fe-Co curve on the Slater-Pauling plot, a subject of theoretical debate since the 1930s, is primarily caused by magnetic saturation in the Co-rich alloy and a weak electron-electron interaction in the Fe-rich alloy.The explanation of Pauling, i.e., only 2.4 magnetizable d electrons per spin, is an incomplete representation of the true reasons behind this anomalous Fe-Co curve.2. A Co monolayer on a Cu(lll) surface possesses a new kind of two-atom state which may be described as "spatially modulated".This state has a total energy only slightly above the ferromagnetic ground-state energy.3. A Cr monolayer on the Fe (100) surface is ferromagnetic with a spin polarization of 3.63 electrons.This spin polarization is considerably larger than any other known transition-metal system ~d suggests new directions for the creation of highly magnetic surfaces.The thesis concludes with a set of derived qualitative rules that describe the systematics of itinerant magnetism in heterogeneous systems.